Malicious PDF — malware analysis report

Static analysis result for SHA-256 ceeaa41d48e5e32b…

MALICIOUS

PDF

93.4 KB Created: 2021-08-11 05:57:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-16
MD5: df311306137cc6b1b380373cb874357d SHA-1: a993e023064e523273983a4926ab0885dde7c527 SHA-256: ceeaa41d48e5e32be0778bca447df8ec02c2d078cc462a7393d312e0429e9b26
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV detecting it as a phishing trojan. It contains a high number of external links, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of a visual download button further supports a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ketchas.ru/uplcv?utm_term=zelda+ocarina+of+time+dolphin+emulator+download PDF link annotation
    • http://jngf.cn/files/file/61422686085.pdfIn PDF document text
    • http://cementfeet.com/userfiles/file/mamitut.pdfIn PDF document text
    • https://jxloanchien.com/style/postimage/file/62873534894.pdfIn PDF document text
    • http://alrabbancapital.com/file/files/negar.pdfIn PDF document text
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/90ef1c2117cff693f68ff41498629a00/25991640367.pdfIn PDF document text
    • https://cecprint.com/images/file/46463726233.pdfIn PDF document text
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a2ff1a98dc8---63996246186.pdfIn PDF document text
    • http://www.cenlaenvironmental.com/siteuploads/editorimg/file/67191925331.pdfIn PDF document text
    • http://matrixuniverzum.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16084a7f9831bb---xodepofabuzi.pdfIn PDF document text
    • http://danies.ru/ckfinder/userfiles/files/88475965477.pdfIn PDF document text
    • http://www.florentmaussion.net/userfiles/File/wemumek.pdfIn PDF document text
    • http://dfh-consulting.com/userfiles/file/fekemi.pdfIn PDF document text
    • https://www.southdownscellars.co.uk/ckfinder/userfiles/files/21484883627.pdfIn PDF document text
    • https://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9b4431bf2f---logapa.pdfIn PDF document text
    • https://morethancars.eu/uploads/edytor/file/42363840828.pdfIn PDF document text
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/160f8fa35d70a0---nutev.pdfIn PDF document text
    • http://agcslohian.com/userfiles/file/gabukolegu.pdfIn PDF document text
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ebebc54a73---josiwobete.pdfIn PDF document text
    • https://www.propertyfilevault.com/wp-content/plugins/super-forms/uploads/php/files/6d7f729a6346823aa2edb8187b3097db/55176844778.pdfIn PDF document text
    • http://booklandbooks.com/userfiles/file/vikepa.pdfIn PDF document text
    • https://cutletsmeat.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e2aa52d60ec---mozefam.pdfIn PDF document text
    • https://vizzzio.ru/wp-content/plugins/super-forms/uploads/php/files/b6737d90d7b7127f75877659d47ca489/61312405911.pdfIn PDF document text
    • https://www.gamulatorIn PDF document text
    • http://e1pl2.nazwa.pl/busy/fotki/file/kutasexinugonuvuvevozi.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000105f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105F3 18388 bytes
SHA-256: 903623790466d2d20a1c674d24fc2fbf29c35c340eceae24a78888fa2a64172a
font_01_sfnt_off00013595.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13595 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014dac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14DAC 10864 bytes
SHA-256: f63f50c9a6c068d4caadbcb910f1a89620c8791845c3c63a7403d3f0f6a44b1d

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